# NAME

Dancer2::Plugin::REST - A plugin for writing RESTful apps with Dancer2

# VERSION

version 1.03

# SYNOPSIS

```perl
package MyWebService;

use Dancer2;
use Dancer2::Plugin::REST;

prepare_serializer_for_format;

get '/user/:id.:format' => sub {
    User->find(params->{id});
};

get qr{^/user/(?<id>\d+)\.(?<format>\w+)} => sub {
    User->find(captures->{id});
};

# curl http://mywebservice/user/42.json
{ "id": 42, "name": "John Foo", email: "john.foo@example.com"}

# curl http://mywebservice/user/42.yml
--
id: 42
name: "John Foo"
email: "john.foo@example.com"
```

# DESCRIPTION

This plugin helps you write a RESTful webservice with Dancer2.

# CONFIGURATION

## serializers

The default format serializer hash which maps a given `:format` to 
a `Dancer2::Serializer::*` serializer. Unless overriden in the 
configuration, it defaults to:

```
serializers:
  json: JSON
  yml:  YAML
  dump: Dumper
```

# KEYWORDS

## prepare\_serializer\_for\_format

When this pragma is used, a before filter is set by the plugin to automatically
change the serializer when a format is detected in the URI.

That means that each route you define with a **:format** param or captures token 
will trigger a serializer definition, if the format is known.

This lets you define all the REST actions you like as regular Dancer2 route
handlers, without explicitly handling the outgoing data format.

Regexp routes will use the file-extension from captures->{'format'} to determine
the serialization format.

## resource

This keyword lets you declare a resource your application will handle.

```perl
resource user =>
    get    => sub { # return user where id = params->{id}   },
    create => sub { # create a new user with params->{user} },
    delete => sub { # delete user where id = params->{id}   },
    update => sub { # update user with params->{user}       };

# this defines the following routes:
# GET /user/:id
# GET /user/:id.:format
# POST /user
# POST /user.:format
# DELETE /user/:id
# DELETE /user/:id.:format
# PUT /user/:id
# PUT /user/:id.:format
```

## helpers

Helpers are available for all HTTP codes as recognized by [Dancer2::Core::HTTP](https://metacpan.org/pod/Dancer2%3A%3ACore%3A%3AHTTP):

```perl
status_100    status_continue
status_101    status_switching_protocols
status_102    status_processing

status_200    status_ok
status_201    status_created
status_202    status_accepted
status_203    status_non_authoritative_information
status_204    status_no_content
status_205    status_reset_content
status_206    status_partial_content
status_207    status_multi_status
status_208    status_already_reported

status_301    status_moved_permanently
status_302    status_found
status_303    status_see_other
status_304    status_not_modified
status_305    status_use_proxy
status_306    status_switch_proxy
status_307    status_temporary_redirect

status_400    status_bad_request
status_401    status_unauthorized
status_402    status_payment_required
status_403    status_forbidden
status_404    status_not_found
status_405    status_method_not_allowed
status_406    status_not_acceptable
status_407    status_proxy_authentication_required
status_408    status_request_timeout
status_409    status_conflict
status_410    status_gone
status_411    status_length_required
status_412    status_precondition_failed
status_413    status_request_entity_too_large
status_414    status_request_uri_too_long
status_415    status_unsupported_media_type
status_416    status_requested_range_not_satisfiable
status_417    status_expectation_failed
status_418    status_i_m_a_teapot
status_420    status_enhance_your_calm
status_422    status_unprocessable_entity
status_423    status_locked
status_424    status_failed_dependency
status_425    status_unordered_collection
status_426    status_upgrade_required
status_428    status_precondition_required
status_429    status_too_many_requests
status_431    status_request_header_fields_too_large
status_444    status_no_response
status_449    status_retry_with
status_450    status_blocked_by_windows_parental_controls
status_451    status_redirect
status_494    status_request_header_too_large
status_495    status_cert_error
status_496    status_no_cert
status_497    status_http_to_https
status_499    status_client_closed_request

status_500    status_error, status_internal_server_error
status_501    status_not_implemented
status_502    status_bad_gateway
status_503    status_service_unavailable
status_504    status_gateway_timeout
status_505    status_http_version_not_supported
status_506    status_variant_also_negotiates
status_507    status_insufficient_storage
status_508    status_loop_detected
status_509    status_bandwidth_limit_exceeded
status_510    status_not_extended
status_511    status_network_authentication_required
status_598    status_network_read_timeout_error
status_599    status_network_connect_timeout_error
```

All 1xx, 2xx and 3xx status helpers will set the response status to the right value
and serves its argument as the response, serialized.

```perl
status_ok({users => {...}});
# set status to 200, serves the serialized format of { users => {... } }

status_200({users => {...}});
# ditto

status_created({users => {...}});
# set status to 201, serves the serialized format of { users => {... } }
```

For error statuses ( 4xx and 5xx ), there is an additional dash of
syntaxic sugar: if the argument is a simple string, it'll
be converted to `{ error =` $error }>.

```perl
status_not_found({ error => "file $name not found" } );
# send 404 with serialization of { error => "file blah not found" }

status_not_found("file $name not found");
# ditto
```

# LICENCE

This module is released under the same terms as Perl itself.

# AUTHORS

This module has been written by Alexis Sukrieh `<sukria@sukria.net>` and Franck
Cuny.

# SEE ALSO

[Dancer2](https://metacpan.org/pod/Dancer2) [http://en.wikipedia.org/wiki/Representational\_State\_Transfer](http://en.wikipedia.org/wiki/Representational_State_Transfer)

# AUTHOR

Dancer Core Developers

# COPYRIGHT AND LICENSE

This software is copyright (c) 2026, 2014, 2013 by Alexis Sukrieh.

This is free software; you can redistribute it and/or modify it under
the same terms as the Perl 5 programming language system itself.
